package week2;
public class Shift{
	public static void main(String[] args){
		int number = 1;
		System.out.printf("2的一次方%d%n",number);
		System.out.printf("2的二次方%d%n",number = number << 1);
		System.out.printf("2的三次方%d%n",number = number << 2);
		System.out.printf("2的四次方%d%n",number = number << 3);
}
}